In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
Correct Answer :
C. both (a) and (b)
Related Questions
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments. These are situated in the segments
7th, 8 th, 9th and 10th
8th, 10th, 12th and 15th
8th, 9th, 12th and 13th
7th, 9th, 12th and 13th
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
The cliteilum singulum in earthworm is formed by
12,13 and 14 segments
13,14 and 15 segments
14,15 and 16 segments
16,17 and 1&segments
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
5. The pre-typhlosolar region in Pheretima extends from
fifth to twenty-sixth segment
first to twenty-sixth segment
fifteenth to twenty-sixth segment
immediately after clitellar region to twenty sixth segment
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
The fertilization in earthworms occurs in
oviduct
spermatheca
cocoon
clitellum
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
In Pheretima, the blood glands are located
close to lateral hearts in segments 12 and 13
along the latero-oesophageal hearts in segments 12 and 13
both (a) and (b)
behind the pharyngeal mass in segments 4, 5 and 6
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
Anticoagulant secreted by leech is
Hirudin
Heparin
Haematin
Haemozoin
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
The chloragogen cells of earthworm are analogous to
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands
Role of typhlosole in the intestine of earthworm is
to kill bacteria
to increase absorptive surface
to produce digestive enzymes
to control blood flow
Which region in earthworm is the forest of nephridia ?
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
The direction of blood flow in the dorsal vessel of earthworm is
from the posterior to the anterior end
from the anterior end to the posterior end
from dorsal vessel to ventral vessel
alternately in both directions (a) and (b)
Chloragogen cells of Pheretima play a role very much like that of
Liver of vertebrates
Choanocytes of sponges
Malpighian tubules of vertebrates
None of these
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
The terminal nephridial ducts of the septal nephridia of Pheretima open into
each intersegmental septum
septal excretory canal
lumen of the intestine
supra-intestinal excretory ducts
Earthworms do not have any respiratory organs because
they do not need them
they are burrowing in habit
there is no sufficient space for such organs
the surface acts as an absorptive area which is larger than the volume
The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It is an adaptation for
conservation of water
conservation of heat
regulation of temperature
regulation of amino acids
Sperma thecae in earthworm are meant few
producing sperms
storage of its own sperms
storage of sperms of another earthworm after copulation
all of these
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca